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Post by gprose on Oct 6, 2013 4:30:23 GMT -5
I recently converted from MTL track to Rokuhan track and this has generally gone well except in one area. About half of my MTL SD40s seem to have a power pickup problem when they cross the rail joints in the curved track sections. If they're traveling at a high speed they keep moving but hesitate when they cross the rail joints but if they're traveling at slow speed they come to a dead stop and won't move unless I push them off the join. It only happens in the curved track sections not in the straight sections and these engines didn't behave this way on the MTL track. It is really puzzling because the rest of my SD40s and all my other engines (MTL and AZL) run just fine on the new track. Any ideas?
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Post by BAZman on Oct 10, 2013 13:33:57 GMT -5
Please check of posts on Trainboard and Z Central Station (this forum is more focused on just the AZL products).
MTL produced a series of turnouts where the Guard Rails (the black plastic next to the Stock rails, the outer ones, not the ones at the Frog) where too close to the Stock rails. Wheel gauging was critical. Many of us filed the Guard rails about 1/2 thinner. Later production resolved this.
Also, the truck bottom is often too close to the rail head (top surface). Literally thousandths of an inch. Many of us have filed them a bit to get above the rails a bit more (keep it from 'lifting' the truck).
And, the front edge of the truck buttom is a square edge. Champher (angle) it a bit.
And, the Plow is also way too close to the top of the rails and often snags on parts of the turnouts, crossings and even rail joints. While it is prototypical clearance, it doesn't work in our scale. File it off a bit.
Hope this helps !
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